Carbureter.



PATBNTBD Nov. 5, 1907. G. M. SGHBBLER.

CARBURETER.

APPLICATION FILED SEPT. 21, 1906.

2 SHEETS-SHEET 2. 3

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l small tubes 21,'preierably coiled.

GEORGE M. SCI-IEBLER, OF INDIANAPOLIS, INDIANA.

- CARBURETER.

Specification of Letters atent.

Patented Nov. 5, 1907.

Application led September 21, 1906. Serial llo. 335,621'.

To all whom 'it may concern:

Be it known that I, GEORGE M. Sci-misten, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Carbureters, ol which the following is a specification. -I

The object oimy invention is to produce a carburetcr of such character that the fuel valve may be automatically opened and closed as the speed oi the engine is increased or diminished.

A further object of my invention is to provide means whereby the amount of effect upon the uel valve may be readily adjusted for di Herent adjustments oi the throttle valve. Y

The accompanying drawings illustrate my invention.

Figure l is a side elevation of a carbureter embodying my improvements. oi Fig. l. Fig. 3, a section on line oi' Fig. 2. Fig. 4, a sectional detail oi the adjustable valve-operating cam. Fig. 5, a side elevation thereof. Fig. 6, a sectional detail ol' a modified form of cam. Fig. 7, a side elevation thereof.

ln the drawings, l() indicates a main body having an air passage Il. with a valve l2 at its inlet end and normally held closed by a light spring I3. Mounted in the outlet end oi passage l1 isa throttle valvel I4 carried by a shaft 16 which may be operated by means oi a lever I7. Leading into the lower end of body l0 is an air passage 1S which leads upward to an exhaust chamber 19 adapted to receive a part or all oi the exhaust irom the engine, said exhaust passing into and out of said chamber through suitable pipes ISV. Communication between passage IS and the exhaust chamber I19 is closed by a head 20, which carries a multiplicity oi The opposite ends of tubes 2l are carried by a head 22 which is set in the wall between passage ll and the exhaust chamber 19 immediately below the throttle valve. At an intermediate point the body 10 is provided with a flange 30 which forms a closure ior the upper end of the reservoir 3l. Forming a communication between the lower part of reservoir 3l and the air passage I8 is a nozzle 32, the discharge end of which is adapted to receive a needle valve 33. The valve 33 is carried by a carrier 34 provided with a polygonal portion 35 t shown in Fig. 2 in partial elevation and partial/section) which tits in a correspondingly shaped opening in a nut 36 screwed into the outer end of the chamber 37. Carrier 34 is normally urged inward by a spring 38 while the valve 33 is normally urged outward in the carrier by a spring 40, outward movement of the valve stem being limited by a cap 4l threaded upon the outer end of the carrier 34 and the arrangement being such that, by turning cap 4l, the valve 33 may be adjusted toward and from nozzle 32. In order to indicate the adjustment of the valve 33, I secure an indicator arm 42 to Fig. 2 is a section on line 2 2v cap 4l, such indicator arm being provided with a catch 43 adapted to engage a gage-plate 44. The gage-plate 44 is partially broken away in Fig. l in order to show the polygonal shape of the portion 35 oi carrier 34. Carrier 34 is provided with a projecting nger'45 adapted to be engaged by one end of the bell-crank lever 46 pivoted to the main body, the opposite end of said lever being engaged by a cam 47 attached to shaft I6 of the throttle valve I4.

In order that the throw of the lever 46, and consequently the throw of thevneedle valve 33 may be adjusted, I deem it advisable to provide means for adjusting the throw of cani 47, and I have found a simple means for this purpose to be that shown in Figs. 4 and 5. In these figures the operating ace of the cam 47 is a spring member 5l secured to the cam at its initial end and at its outer end engaged by an eccentric 52 journaled in cam 47 and provided with an indicator finger 53, traversing a gaged arc 54. In order that the eccentric 52 may positively actuate the spring face 52 in in either direction, I iind ii convenient to turn the end or' the spring i'ace 5I backward so as to embrace the eccentric, as clearly shown in Fig. 4.

It may be desirable to provide means by which the operating tace oi the cam may be more accurately adjusted than by the means shown in Figs. 4 and 5, and for this purpose, if desired, the spring face 5l (Fig. 6) may be provided at an intermediate point with an additional adjusting eccentric 55, which may be turned by a suitable indicator linger 56, traversing gaged arc 57.

Fuel enters the reservoir 3l through a passage 60 controlled by a valve 6l operated by a float 62 arranged in the reservoir 3l in the usual manner.

In adjusting, the throttle valve 14 is thrown to its minimum opening and in this position the upper arm of lever 46 engages the face 5I of cam 47 at its initial end. The needle valve 33 is then adjusted by means of cap 4l until the desired quantity oi fuel is admitted into the air stream coming through passage 18 when the engine is running at its minimum speed. Under these conditions the valve l2 does not open at the suction stroke. The throttle is then opened to its widest point and the plate 5] of cam 47 is adjusted by eccentric 52\ until the needle valve S3` is in such position as to admit the necessary additional quantity of fuel for the highest speed. It will now be seen that, as the throttle valve is moved to control the flow of mixture to the engine, the needle valve will be automatically shifted so as to automatically increase or diminish the flow of fuel into the air stream. The air stream passing through passage 18 is substantially uniform at all speeds while at the higher speeds valve 4l yields so as to admit air through the passage 40, this airstream coming into the carbureted air stream immediately below the throttle valve.

I claim as my invention;

1. In a carburetor, the combination, with a fuel container having a discharge outlet, of a fuel valve, an air passage communicating with said outlet, a throttle valve for controlling the flow through said passage, and intermediate connections between said throttle valve and fuel valve whereby operation of the throttle valve will auto matieally shift the fuel valve, and means for so adjusting the connections between the throttle valve and fuel valve that the effect of movement of e throttle valve on he fuel valve may be independently varied at different points of adjustment of the throttle valve.

2. ln a carbureer, the combination. with a fuel holder having a discharge outlet, of a fuel valve for controlling the flow therefrom, an air passage communicating with said outlet, means for heating said passage, a second air passage, into which the first dischar ls, a yieldingly closed valve ar 'anged in the inlet end of said second passage, a throttle valve controllingl the flow from both of said passages, intermediate connections between the throttle valve and fuel valve, whereby the fuel valve will he the eftect of movement of the throttle valve on the fuel valve, and means for adjusting said connections to vary the cftcet of movement of the throttle valve on the fuel valve variously at different points in the lnovement thereof.

In a carbureter, the combination, with a fuel holder having a di, 'barge outlet, of a f'uel valve controlling the flow therefrom, an air passage communicating with said outlet, a second air passage in which the first discharges, a yieldingly closed valve arranged in the inlet end of said second passaA e, a throttle valve controlling the new from both of said passages, a means for simul taneously operating the throttle valve and fuel valve, and intermediate connections between the throttle "alve and fuel valve. whereby the fuel valve will be shifted simultaneously with the movement of the throttle valve. and means for adjusting' said connections to vary the et'lect of movement of the throttle valve on the fuel valve variously at different points in the movement thereof,

4. ln a carburetor, the combination, with a fuel holder having a discharge outlet of a fuel valve for controlling the flow therefrom, an air pa. age communicating with said outlet, means for heating said passage, a second air passage into which the fiist discharges, a yieldingly closed valve arranged in the inlet end of said passage, a throttle valve controlling the flow from both of said passages. a cam operated by movement of' the throttle valve, means for adjusting the throw of said cam at different points in the length thereof, and intermediate connections between said cam and the fuel valve` 5. in a carlmreter, the combination, with a fuel holder having a discharge outlet, of a fuel valve for controlling the flow therefrom, an air passage communicating with said outlet, a second air passage into which the first discharges, a yieldingly closed valve arranged in the inlet end of said second passage, a throttle valve controllingl the flow from both of said passages, a cam operated by movement: of the throttle valve at different points in the length thereof, means for adjusting the tln'ow ot' said cam, and intermediate connections between said cam and the fuel valve.

6. In a carburetor, the combination, with a fuel holder having a discharge outlet, of a fuel valve for controlling the flow therefrom, an air passage communicating' with said outlet, means for heating said passage, a second air l'iassage into which the first discharges, a yieldingly closed valve arranged in the inlet end of said passage, a throttle valve controlling the flow from both of said passages, a

cam having an operating face formed of a flexible strip, and means for adjusting said strip to change its operating shape relative tothe axis of the cam.

7. In a carburetor, the combination, with a fuel holder having a discharge outlet, of a fuel valve for controlling the flow therefrom, an air passage communicating with said outlet', a second air passage into which the first discharges, a yieldingly closed valve arranged in the inlet: end ot said second passage, a throttle valve controlling the flow from both of' said passages, a cam having an operating face formed of a flexible strip, and means for adjusting said strip to change its operating shape relative to the axis of the ram.

S. ln a carlmreter, the combination, with a lnel holder having a discharge outlet, of a fuel valve for controlling the flow therefrom. an air passage communicating with said outlet, means for heating said pa sage, a second air passage into which the fii'st discharges, a yieldingly closed valve arranged in the inlet end of said pa age, a throttle valve controlling the flow from both of said passages, a cam having an operating face formed of a flexible strip and means f'or adjusting said strip differentially at difvv 'ferent points in its length relative to the axis ot' the cani.

El. ln a carburetor, the combination, with a fuel holder having a discharge outlet, of a fuel valve for controlling` the flow therefrom, an air passage communicating' with said outlet, a second air passage into which the fir t dis charges, a yieldingly closed valve arranged in thel inlet end of said second passage, a throttle valve controllingl the flow from both ot said passages, a cam having an oper ting face formed of a fiexible strip and means for adjusting said strip differentially at different points in its length relative to the axis of the cam.

lll. in a carburetor, the combination, with a main body having a fuel reservoir, an exhaust receiving chamber, a pri mary uir passage passing through said chamber, but having no connection therewith, a secondary tir pa ige, a throttle valve. for controlling the flow of' carlaireted air, a l`ueldischarge nozzle forming a connection between the reservoir and one of said air passages. a valve ti' r controlling the flow of fuel through said nozzle. a cam carried by the throttle valve, means for adjusting the throw ot' said cam atlvarious points in `the length thereof, and means operated by the cani for shifting the fuel valve carrier.

ll. ln a carlnn'eter, the combination. with a fuel holder and discharge nozzle, of a tubular valve-carrier mounted in the fuel holder, a spring for normally ui 'ing said carrier toward the nozzle, a valve mounted in s. d carrier, a spring .for normally urging said valve away from the nozzle, an adjustable means forming an abutment tor said valve whereby it may be adjusted toward and t'roin the nozzle, and means for shifting the valve carrier away from the nozzle.

1;'. ln a carburetier, the combination, with a fuel valve. of means for shifting said fuel valve comprising two cooperating members, one of which is a flexible strip flexible transversely of its length, and means for adjusting said strip transversely at intermediate points olf its length.

lz. In a carburetor, the combination, with a fuel valve. of moan, for shifting said fuel valve, comprising a rain having a face flexible t1 ynsversely of its length, and means for adjusting said face transversely at intermediate points in its length.

[n witness whereof, i, have hereunto set my hand and seal at Indianapolis, Indiana, this lst day of September. A. i). one thousand nine hundred and six.

GEORGE )L SCllrlBlLElt.

[11. si Witnesses Airrnnn M. Hoon,

Tironas W. McMnaxs. 

